1475951 - Keeping the browser console open before putting the computer to sleep causes jank when waking the computer

Status: NEW

(DevTools :: Console, defect, P2)

Description

[Florian Quèze [:florian]]

Steps that caused this:
1. Open the browser console.
2. Forget it in the background.
3. Put the macbook to sleep for a week-end away from work.
4. Open the macbook, notice that Firefox is unresponsive.

Here is the profile I captured as soon as Firefox became responsive enough to enable the profiler: https://perfht.ml/2KY2HTh

Nicolas, is the actionable information in this profile?

Comment 1

[Nicolas Chevobbe [:nchevobbe][PTO - back January 2nd]]

Thanks Florian.

The information is indeed valuable (React spends a lot of time creating elements).
Was this a debug build ?

Comment 2

[Florian Quèze [:florian]]

No, it's a regular nightly (July 6th OS X nightly). There were about 150 tabs.